202121125 has 32 divisors (see below), whose sum is σ = 265224960. Its totient is φ = 153489600.

The previous prime is 202121081. The next prime is 202121137. The reversal of 202121125 is 521121202.

It is a happy number.

It is not a de Polignac number, because 202121125 - 2¹¹ = 202119077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202121099 and 202121108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658222 + ... + 658528.

It is an arithmetic number, because the mean of its divisors is an integer number (8288280).

Almost surely, 2^202121125 is an apocalyptic number.

202121125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

202121125 is a deficient number, since it is larger than the sum of its proper divisors (63103835).

202121125 is a wasteful number, since it uses less digits than its factorization.

202121125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 202121125 is about 14216.9309275947. The cubic root of 202121125 is about 586.8636840803.

Adding to 202121125 its reverse (521121202), we get a palindrome (723242327).

The spelling of 202121125 in words is "two hundred two million, one hundred twenty-one thousand, one hundred twenty-five".